Sewing-machine



2 Sheets-Sheet 1;

(No Mode-L J. TRIPP. SEWING MACHINE.

No. 282,409. Patented July 31, 18,83.

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2 Sheets-Sheet 2.

` J. TRIP?.

(No Model.)

SEWING MACHINE.

No. 282,409. PatentedJuly 31, 188,3.

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ATTORNEY j UNITED STATES `PATENT OFFICE.

JAMES TRIPP, QF NEW" YORK, N. Y., ASSIGN TO CHARLES T. BEOKWITH AND ELLEN F. BECKVITH, BOTH OF QBERLIN, OHIO sl-:wlNc's-MACHINE. j.

SPECIFICATION forming part of Letters, Patent No. 282,409,rdated July 31, 1883.

Application filed September 1, 1882. (No model) T 0l/ZZ whom, it may concern,

Beit known that I, JAMEs TRIPP, a citizen of the United States, residing at New York city, in the county and State of 'New York,

have invented new and useful Improvements in Sewing-Machines, of which the following is a specification.

My invention relates to improvementsin the mechanism for effecting the shuttle movements and 'feed movements of sewing-machines, and also to controlling the tension ofthe thread employed therein, the nature of which will be fully explained by reference to the .following specification and the accompanyingdrawings, which form part of this specication.

Referring to the drawings, Figure 1 is a side view, partly in section, Fig. 2 an under side view, and Fig. 3 a sectional end view, of so much of a sewing-machine with my improve ments applied thereto as will illustrate my invention. Figs. 4, 5, 6, 7, 8, 9, and 1() show detail views of the upper `part of the shuttlelever connection. j Figs. 11, 12, 13, 14, and 15 show detail views of parts separately.

- In eachof the views similar letters of reference are employed to indicate corresponding parts wherever they occur.

A represents the bed-plate, and B the post of the arm. Gis the arm, and D is the face or head of the machine proper.

` In carrying out my invention I mount upon the main shaft E a cam-piece, E', one portion of which, e, is turned so as to revolve between surfaces z z (by preference finely planed) on theface of the blocks Z, applied between the `forked ends g` g` of the lever G, commonly known as the shuttle-lever connection. 7 The blocks Z, on their front faces, z z, are planed, ground, or otherwise formed perfectly flat and true, while on their rear they are recessed from z to z2 and from z3 to e4, the recesses z2 and z3 z being of a section forming a portion of the arc of a circle, as shown more clearly by the enlarged separate views, Figs. 8, 9, and 10.

The forked ends g g of lever G are formed 4 withsemicircular ro'ections 8 corres Vonding with and adapted to be received within the semicircular recesses z z2 and z3 z* in the blocks Z Z. Between the recesses z z2 and z3 z* ofeach block Z, Iform a straight bar or prof jection, z5, which is adapted to be received and held ,within a correspondinglyformed recess, g, formed in each of the arms g of the lever G. rlhe object of thus forming the surfaces z z, against which the part e of the cam E op crates, is to allow of a fine finish being readily applied to such surfaces, together with great `and` the surfaces z z is avoided. The lever or shuttle connection G is formed with a short horizontal hollow hub, g, through which is inserted a solid shaft, g2, turned to lit truly to the internal diameter of the hollow hub g. The solid shaft g2 is formed at each end with conical recesses adapted to receive the pointed or conical ends of bearing=screws g3 g, supported in the post B.

The relative positions of the hollow hub g and solid shaft g2 may be adjusted at will, when setting up the machine .or otherwise, by means of fa set-screw, g5, which passes through the hollow hub g and binds against and holds the solid shaft g2 in any desired relation to the hol-Y low hub g, carrying tlie shuttle-lever connection G. Thelower end of the shuttle-lever connection G is formed with the ordinary ballconnection gy, adapted to be received j into the forked end h of the shuttle-lever H, which is of the ordinary and well-known construction. r

rIhe second portion, e', of the cam-piece E is `formed with a slot `or groove, e2, adapted for the reception of the strap or band t', affixed to and controlling the position of the upper end of the rod I, commonly known as the feedconnectioru7 the lower end, i', of which, as shown in Figs. 1 and 3, is pivoted at 2 to a lever,` J, the short arm J of which is provided with a roller or bearing-surface, j, adapted to bear against a cam, K, which is formed with two plain surfaces, la k, and one beveled or inclined surface, k2, and adapted for adjustment in position to vary the extent of feed to the machine, as hereinafter more fully eX- plained. l j

rI he long arm J l of the lever J is formed or provided with a balllor projection, j", adapted IOO to be received and held within a socket, Z, forward on or affixed to a short bent arm or elbow, L', of the feed-lever L, which is of the ordinary construction, and is pivoted to thebed-plate A at Z', and operates theV feed-bar Z2 and the "feed7 in the ordinary manner. At the rear end of the feed-lever L, I form a socket, into which I tap a screw, M, formed at its upper end with a concave seat, m, adapted to receive and hold the lower end of a shaft or pin, N, formed at each end with rounded ends formed that when a roller, I), which is pivoted at p to the shuttle-lever connection G, in the movement of the machine, passes over such cam-surface o', it shall alternately causethe lowering or allow of the raising of the lever O, and consequently the depression or raising of the feed-lever L. The screw M is turned backward or forward, as desired, so as to adjust the height of the feed, and when so adjusted the screw M is held in the desired position by means of a setscrew, Z, passing through theside vof the feed-lever L.

The cam K, which, as before described, is formed with two plain surfaces, '7c k', and one beveled or incline surface, k, is formed, as

shown in Figs. 3 and l2, with the surface 7a of a cylindrical form, while the surfaces of the parts lo' k" are of constantly increasing and decreasing diameter from the point 1, which is the point at which the device will cause the shortest possible stitch to be made of which themachine is capable. The cani K is formed with'a hollow bearing, K', which is adapted to be received upon a hollow projecting bearing, K2, formed on the under side -of a sliding plate, K, supported in guides Ki, formed on or affixed to the under side of the bed-plate A, as shown in Figs. 2 and 12.

Through the center of the hollow projecting ybearing K2 and the cam K is passed a shank,

K5, the'lower end of which, at K, is screwed Y into the cam K, and holds the same at any desired position, and when so adjusted the screw K6 and the cam are held in proper relation by means of a set-screw, K'. At its upper end the shank K5 is formed with an enlargement, K8, and a head or thumb piece, K, for the purpose of causing the partial or total revolution of the cam K for the purpose of altering the position of the surfaces of the cam K in relation to the roller j of the lever J in order to Vary the feed. The slide K3, at its forward end, is provided with a slot, K4, which serves as a guide to. control the position of the rod or feed-connection I laterally. The slide K3, when adjusted in position, is there retained by a set-screw, K5, which passes through a slot, K, and is secured in the under side of the bed-plate A.

R is the tension device, which is composed of a pair of tensiondisks, r r, of the ordinary construction, mounted ,centrally on a stud or pin, 7J, which at its upper end is provided with'a thulnb 'or binding screw, r", for the purpose of regulating the pressure on the plates,

and consequently the tensionv of the thread s as it is drawn off from the bobbin S, which is supported on a pin or stud, s', carried by the arm C in the usual manner. VThe stud or pin r of the tension R is screwed into the center of a circular socket, r3, formed on or affixed to the arm C, 4as shown in Fig. 1'. In the center of this socket r3, and encircling the stud or pin r, I arrange a coiled or other suitable spring, r, which bears against the under side of a spring-lever, T, one end of which, at t is provided Withra slot or opening, through which' is passed a screw, t', which is secured into the head D, and holds the spring-lever T in a proper position. The lever T is formed with a central opening at t2 for the passage of the stud or pin r' therethrough. The lever T, at its rear end, is provided with abent extension, T', by means of which the spring T maybe depressed when desired, as hereinafter eX- plained. The disks r r, as shown in Fig. 1, when the parts are in position, rest on the upper surface of the lever T. y

U is athreadguide supported by the head D, and W is the needle-bar.

The operation of the tension device is as follows: The thread from the bobbin S is conducted through an eye or loop in the threadguide U. It is then conducted backward and between the disks r fr, and thence through the eye w of the needle-bar W, after which it passes in the ordinary. or other suitable manner to the needle W', for use. The amount of tension is regulated by the thumb-screw 1"". When, however, for any purpose, it is required to separate the tension-disks, so as to allow of the thread being drawn therethrough, or for inserting a new thread, it is'simply necessary to depress the end of the bent extension T' of the spring-lever T with the thumb or lingers, so

as to compress the spring r, when the pressure will be removed from the disks r r, and the thread s will be allowed to freely pass between the same so long as the lever T is decase with mechanism of the ordinary construction.

ing lever adapted to be operated automatically by a moving part of the machine has heretofore been used ina tension device. I do not therefore broadly claim such a construction.V

Modications may be made in my invention I am aware that a pivoted bearing and releaS- IOO IIO

'282,409A i E without departing from the peculiar characteristics thereof. In some cases theparts e z2 and z3 z* of the block Z may project,r in place of being recessed, in which case the parts gl gS will be formed recessed. j n

Having thus described my invention, what I claim, and desire to secure by Letters Patent,

`l. The combination, with the feed-connection of a 'sewing-machine, `of a pivoted con` nectingbar controlled in position at one end by an adjustable cam-surface, and provided at the opposite end with a pivotal connection operating the feedlever, substantially as set forth.

2. The combination, with the feed-connection of a sewing-machine, of a pivoted connecting-bar controlled in position at one end by a pivoted cam capable of adj ustment by a thumbscrew, and provided at its opposite end with a ball Working ina bearing or socket formed in a bent arm oreXtension forming part of or connected with the' feed-lever, substantially as shown and described.

3. In a sewing-machine, the combination7 with a shuttle-lever connection provided at its lower end with a roller or bearing-surface, P, of a lever,'O, pivoted to the side of the post B, and provided on its upper side with-a camsurface, o', avertical connecting pin or rod, N, and a feed-lever, L, having an adjustable screwbearing, M, for the pin or rod N, substantially as and for the purpose described.

4. 'The combination, with the shuttle-lever connection of a sewing-machine, provided with a roller or bearingfsurface', I, ofa pivoted camlever, O, connection N, and a feed-lever having an arm or extension controlling the mo-4 tion of the feed-lever by means of a pivoted lever actuated by the feed-connection and controlled in position by an adjustable cam, sub stantially as shown and described.

5. The combination, with the shuttle-lever connection of a sewing-machine, provided with a roller or bearing-surface, P, of a pivoted ca1n-lever,`O, socketed connection N, and a feed-lever, L, provided with an adjustable screw-bearing, M, bent arin L', and a socket,

`position by an adjustahle cam-surface, substantially as shown and described.

6. In a sewing-machine, the combination, with a shuttle-lever connection provided at its 5 5 lower end with a roller or bearingsurface, I), of a pivoted cam-lever, O, connection N, a feed-lever, L, adjustable bearing M, bent arm L', socket Z, pivoted arm J, roller or surface j, feed-connection I, .and adjustable cam K, sub- 6o stantially as and for the purpose described.

7. In asewing-machine, an adjustable rre- .volving cam-piece, K, mounted on a sliding adjustable plate, K3, substantially as and for` the purpose described. 6 5

8. In combination with the feed-conneetion `I, the sliding adjustable slotted guide-plate K3, substantially as and for the purpose de-V scribed. i f

94. In a sewing-machine tension, the colnbi- 7o nation, `with the tension disks or surfaces and an independent tension-spring, of a pivoted bearing and releasing lever provided with an extension adapted to be operated by hand for removing the pressure of the tension-spring 75` from the disks, substantially as shown and de: scribed. j n.

10. In a sewing-machine tension, tlie combi` nation, with the tension-disks r o, stud r", and bindingscrew r2, of the socket r3, spring r4, So and spring bearing and releasing lever T substantially as and for the purpose described.

1I. In a sewing-machine, the combination, with the ,main shaft E and cam-piece E', of the forked lever G, formed with arms g g, provided 8 5 with semicircular portions gl g8 and a straight portion, y, and the blocks Z Z, 4having correspondingly-formed curved portions z z2 z3 z* and straight portion z5, substantially as wand for the purpose described. 9o

In witness whereof I have hereunto set my hand this 28th day of August, 1882.

JAMES TRIIP.

Vitnesses:

' MAX BAYnRnslnoRrnn,

K. M. SUPrLn. 

